Twitter has released a list of Hot Topics for 2011; according to its data, Hollywood actors Charlie Sheen and the late Elizabeth Taylor were among the top-trending actors for the year.

The world of films was led by the Chris Hemsworth-starrer, Thor; the television series Pretty Little Liars led trending topics for the small screen; and former Egyptian President Hosni Mubarak's resignation was the top political story.

The full list is as follows:

Actors: Charlie Sheen, Macaulay Culkin, Ryan Dunn, Ricky Gervais, Pete Postlethwaite, Tracy Morgan, Jake Gyllenhaal, Ashton Kutcher, Colin Firth and James Franco.

Actresses: Elizabeth Taylor, Mila Kunis, Anne Hathaway, Raven Symone, Natalie Portman, Elisabeth Sladen, Jennifer Lopez, Nina Dobrev, Emma Watson and Fernanda Vasconcellos

Television: Pretty Little Liars, Two and a Half Men, The Craigslist Killer, the Golden Globe Awards and the People's Choice Awards.

Music: Rebecca Black and Friday, Nate Dogg, Femme Fatale, Gerry Rafferty and Gil Scott-Heron.

Cities and countries: Cairo, Egypt, Japan, Libya, Tokyo, Dallas, Vancouver, Hawaii, Joplin and Austin.

World News: Mubarak's resignation, the Osama bin Laden raid, the Japanese earthquake and the Fukushima nuclear disaster, the shooting of Gabrielle Giffords, Col. Moammar Gadhafi's death and the swine flu outbreak.